Mechanical movement



E. M. DOHERTY AND J. H. JEFFRIES.

MECHANICAL MOVEMENT.

APPLICATION FILED FEB.12,1919- 1,33 8,427. v Patented Apr. 27, 1920.

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E. M. DOHERTY AND J. H. JEFFRIES. MECHANICAL MOVEMENT.

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E. M. DOHERTY AND J. H. JEFFRIES.

MECHANICAL MOVEMENT.

APPLICATION FILED FEB. 12, 1919. I

' Patented Apr. 27, 1920.

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EDWARD M. DOI-IERTY, LOS ANGELES, AND JOHN H. JEFFRIES, F INGLEWOOD,

' CALIFORNIA.

MECHANICAL MOVEMENT.

To all whom "it may concern:

Be it known that we, EDWARD M. Do- HERTY and JOHN H.. JEFFRIES citizens of the United States, residing at 1108 Angeles and Inglewood, in the county of Los Angeles and State of California, have invented new and useful Improvements in Mechan1- cal Movements,"of which the following is a specification. 1

Our object is to make a pump head having a long stroke and straight linefpull on plunger rods, and our inventionconsists of the novel features herein shown, described and claimed.

Figure 1 is a side elevation of a pump head embodying the principles of our invention, the view being taken looking in the direction indicated by the arrows 1 in Flgs. 2 and 3, parts being broken away and shown in section.

Fig. 2 is a vertical cross section on the line 22 of Fig. 1. n

Fig. 3 is a to plan view as indicated by the arrows 3 in *igs. 1 and 2.

Fig. 4 is a horizontal section on the lines 44 of Figs. 1 and 2.

Fig. 5 is a horizontal section on the lines 55 of Figs. 1 and 2.

Fig. 6 is a diagrammatlc view mostly on the same plane as Fig. 1 and principally showin the moving parts.

Fig. 7 is a perspective of one of the sliding crosshead members.

Fig. 8 is a perspective of the sliding block fitting in the slideway in Fig. 7.

The base 1 may be a heavy casting. Parallel T slots 2 and 3 are formed from the upper face of the base 1. Enlargements 4 and 5 are formed upon the extreme sides of the base 1 to make supporting ledges around the slots 2 and 3. A central opening is formed through the base 1 half way between the slots 2 and 3. A fitting 6 is fixed in the central opening and extends downwardly into the well 7, and the well casing 8 extends downwardly from this fitting. The pump head, as shown, is especially designed to operate a double plunger pump, not shown, in the'casing 8, and the pump is operatedby an inside pump rod 9 and an outside pump rod 10. The orosshead "con- 'struction 11 is connected to thenpper end of the inside pump rod 9, and the crossh'ead construction 12 is connected to the upper end of the outside pump rod '10. It is de- Specifieation of Letters Patent.

Patented Apr. 27, 1920.

Application filed February 12, 1919. Serial 110.276.694.

sired to work'the pump rods 9 and in opposite directions, so that when the crosshead construction 12 goes down, as in Fig. 1, the crossheadconstruction 1]. goes up and woe versa. 7

The base 1 is rigidly mounted relative to the well hole 7 and held in place by anchor bolts 13 inserted downwardly through the baseinto the concrete foundation 14. The movable base 15 is a heavy cast plate resting upon the ledges 4 and 5 and having ribs 16 extending downwardly intermediate of the ledges to rest upon the intermediate portion of the base 1. Clamping bolts 17 are placed with their heads in the slots 2 and 3 and the bolts extend upwardly through the sliding base 15 so as to clamp the sliding base 15 rigidly to the main base 1. The base 1 is substantially twice the width of the sliding base 15, so that the sliding base 15 may be moved forwardly and clamped in position over the well hole, and so that the sliding base may be moved backwardly to move the pump head out of the way to provide access to the well hole for pulling the pump, repairing the pump, lowering the pump, cleaning the well, etc.

A rear wall 18extends upwardly from the back side of the sliding base 15. End walls 19 and 20 extend upwardly from the ends of the sliding base 15 and the back 18, and a plate is fitted to the front edge of the sliding base 15 and to the front edges of the end walls 19 and 20 and secured by cap screws to make the front wall 21 so as to make a chamber 22 above the sliding base 15 which will hold oil for lubricating the moving parts of the pump head. A stub countershaft 23 is fixed through the wall 19, a small pulley 24 and a large pulley 25 are fixed together and mounted upon the stub shaft 23, a motor 26 is mounted upon '33, said posts being mounted in the chamber 22 just inside of the end wall 19. Similar eye beam posts 34 and 35 are mounted inside of the end wall 20 and secured to the sliding base 15 by angle iron brackets 36.

A hearing 37 is fixed between the posts 31 and 32 about half way up, and a bearing 38 is fixed between the posts 34 and 35 in alinement with the bearing 37, the main operatin shaft 30 being mounted in the bearings 3 and 38. A-shaped pedestals 39 and 40 are fixed to the sliding base '15 one on each side of the center and have bearings 41 and 42 at their upper ends through which the shaft 31 extends. A countershaft 43 is mounted in a bearing 44 about half way up the pedestal 39 parallel with the shaft 30, and a similar countershaft 45 is mounted in the bearing 46 in line with the shaft 43. A sprocket wheel 47 is fixed on the shaft 30 between the bearings 37 and 41, and a similar sprocket wheel 48 is fixed on the outer end of the shaft 43 in line with the sprocket wheel 47.

A chain 49 runs upon the sprocket wheels 47 and 48. In a like manner a sprocket wheel 50 is fixed on the shaft 30 between the bearings 42 and 38, a sprocket wheel 51 is fixed on the outer end of the counter shaft 45, and a chain 52 connects the sprocket wheels 50 and 51. In a like manner the chains 53 and 54 are mounted upon sprocket wheels fixed upon the shaft 30 and upon sprocket wheels fixed upon the inner ends of the shafts 43 and 45.

The upper ends of the posts 31, 32, 34 and 35 are rigidly connected by braces 55. Guide rods 56 and 57 are mounted in the sliding base 15 and in the braces in line with the chain 49. Similar guide rods 58 and 59 are mounted in line with the chain 52. Guide rods 60 and 61 are mounted in line with the chain 53, and guide rods 62 and 63 are mounted in line with the chain 54.

The crosshead member 64 is slidingly mounted upon the guide rods 56 and 57. The crosshead member 65 is slidingly mounted upon the guide rods '58 and 59. Bars 66 connect the upper ends of the crosshead members 64 and 65. The pump rod bearing 67 is supported by the bars 66 and the inner pump rod 9 is slidingly mounted through the bearing 67, there being a spring 68 on top of the bearing, and a spring seat 69 upon the upper end of the pump rod against the spring so as to make a yielding connection between the pump rod 9 and the crosshead construction 11. In a like manner the crosshead member 70 is'slidingly mounted upon the guide rods 60 and 61, and the crosshead member 72 is slidingly mounted upon the guide rods '62 and 63.. A hearing 73 is rigidly fixed to connect the lower ends of the crosshead members 70 and 72. The outer pump rod 10 is mounted through the bearing 7 3, a spring 74 is mounted upon the bearing 73, and a spring seat 75 is fixed upon the upper end of the pump rod 10 against the spring 74 to make a yielding connection between the outer pump rod 10 and the crosshead construction 12.

The crosshead member 64 comprises upper bearings 76 and 77, lower bearings 78 and 79, and a central body 80 connecting the bearings 76 and 77 to the bearings 78 and 79, there being a horizontal slideway 81 in the body 80. The body 80 consists of the webs 82 and 83, and a vertical. slot 84 extends from the lower end to near the upper end of the web 83, the lower end of the slot being open, and a similar vertical slot 85 extends through the web 82, there being a bridge 86 around the lower end of the slot 85 to connect the lower ends of the web portions 82 together. The chain 49 and sprocket wheels 47 and 48 are located in the opening 87 between the webs 82 and 83, and the member 64 moves up and down with the top of the upper sprocket and the under side I of the lower sprocket; the slots 84 and 85 being of corresponding length, thus. permitting of a pump stroke of unusual length which is desirable in pumping deep wells. The bridge 86 passes the end of the shaft 43.

In side elevation the slots 84 and 85 are crosswise of the slideway 81, and in an edge view the slideway 81 extends equal distances each side of the opening 87. The bearings 76, 77, 78 and 79 fit upon the guide rods 56 and 57. The slideway opening 88 between the webs 82 and 83 on one side of the slots 84 and 85 is in line with the slideway opening 89 between thewebs 82 and 83 on the other side of the slots. A block 90 is placed on one side of the chain 49, and a similar block 91 is placed on the other side of the chain and a pin 92 is inserted through the centers of the blocks and through a joint in the chain to connect the blocks to the chain.

The blocks 90 and 91 fit in the slideway 81, and as the chain travels the blocks slide back and forth across the opening and across the slots 84 and 85.

Referring to the diagram in Fig. 6 and assuming that the pulley 29 is rotating in the direction indicated by the arrow 93 and the chain 49 is traveling in the direction indicated by the arrow 94, and the slideway is at the top of the stroke, continuous operation will cause the blocks 90 and 91 to pass from the opening 88 to the opening 89, and the blocks will travel downwardly with the chain causing thecrosshead memof the crosshead member 65 is identicalwith that'already described relative'to the crosshead member 64, and the two crosshead members being rigidly connected will pass up and down together and operate the inner pump rod 9. In a like manner the crosshead members 70 and 7 2 are mounted upon the guide rods 60, 61, 62 and 63 and are operated by the chains 53 and 54. The parts are set and timed so that the crosshead members 64 and 65 go up while the crosshead members 70 and 72 are going down and vice versa, and this operation requires a considerable length of the pump rod 9 between the crosshead construction 11 and the crosshead construction 12.

In constructing the movable base 15 a notch 95 is formed from the forward edge and a plate 96 is placed in position to cover the notch and bolt it to the base. The pump rods pass through the plate 96. In constructing the bearing 7 3 the cap 97 is made removable. A drain cook 98 leads from the bottom of the chamber 22. During the operation of the pump head the chamber 22 may be kept filled with lubricating oil to any desired extent, and this will effectually lubricate all of the moving parts of the pump head.

When it is desired to move the pump head to provide access to the well the oil is drawn from the chamber 22 through the drain cock 98, the bolts 2 and 3 are loosened, the belt 27 is run off the pulleys, the plate 21 removed from the base 15, the plate 96 unbolted, the nut 99 removed from the upper end of the inner pump rod 9, and the pump rod allowed to drop out of the bearing 67 The cap 97 is removed to allow the pump rods 9 and 10 to pass forwardly through the notch 95, and then the entire construction can be moved backwardly upon the ledges 4 and 5 thus uncovering the well.

Thus we have produced a pump head having a stroke of unusual length for operating a double plunger pump in which one plunger and its operating mechanism counterbalance the other plunger and its operating mechanism, and we have mounted the pump head, so that it may readily be moved to provide access to the well, and so that the operating mechanism may be flooded with oil.

Various changes may be made without departing from the spirit of our invention as claimed.

We claim:

1. A mechanical movement comprising a power shaft having a sprocket wheel; a second shaft spaced from the power shaft and having a second sprocket wheel; a crosshead comprising two plates connected together forming a parallel opening between, each plate carrying a transverse slot opening upwardly, the cross-head being adapted to be mounted upon the sprocket wheels with the operating chain within the central opening, there being longitudinal slots in each plate forming the cross-head adapted to receive two shafts; achain mounted upon the two sprocket wheels; a pair of slides, one mounted upon either side of the chain and pivotally connected therewith and adapted to slidably operate in the transverse slots of the cross-head; and means for guiding the cross-head in its movement set up by the operation of the chain over the sprocket wheels. 7

2. A mechanical movement comprising a. power shaft having four sprocket wheels, and a counter shaft mounted vertically below the power shaft and having four sprocket wheels positioned vertically below the sprocket wheels of the power shaft; chains mounted on the sprocket wheels; cross-heads comprising two plates fixed together forming a parallel central opening and adapted to be mounted slidably over the chains and sprocket wheels, there being longitudinal slots in the plates adapted to be slidably mounted upon the two shafts, and there being one cross-head foreach chain, said plates also carrying transverse slots opening inwardly slides mounted upon each side of each chain and pivotally connected therewith and adapted to slidably operate in the inwardly opening slots of the crossheads, means for guiding the cross-heads in vertical movement, means for connecting the two outside cross-heads of the set of four with a pump rod, and means for connecting the two inner cross-heads of the set of four with a second pump rod operating in the same well with the first mentioned rod.

In testimony whereof we have signed our names. to this specification.

EDWARD M. DOHERTY. J. H. JEFFRIES. 

